Excel pivot table? Edit pivot table sub catagory

ok this may be a tuff one to explain. Working with a workbook.
I did not create. Creator is no longer with the company.

Workbook has a database(worksheet) call masterlog were we enter all leads and their sources(self gen, marketing ,mail, referal, Store 1 , store 2 etc...)

I see 2 pivot tables(with drop downs) one is "lead source"-its drop down displays the leads mentions above(tech turnover, self gen, marketing ,mail, referal, Store 1 , store 2 etc...)

The second pivot table has a drop down(Turn over, Retail, Store, BLank)
Somehow
Turnover=Tech turnover
Retail=self ge,marketing,mail,referal)
Store=store1,store2

How do I edit the second drop down. I want to add store 3 to the "store"
Store=store1,store2,store3

I cannot see anywhere in this workbook how"turnover,Retail and store" were created. I dont see a list tab for these.

When I look at the drop down for lead source2 it now
displays


Turnover
Retail
Store
Store3



I hope I am explaining this clearly.

Feel free to ask questions if more detailed info is needed.

Thanks

You may have some hidden worksheets in the workbook. Right click on one of the visible tabs and select Unhide if it's available.